Balanced valve



J. R. SAYWARD.

BALANCED VAILVE.

APPLICATION FILED JAN-28.1919.

21,673. Patented Nov. 11, 1919.

i Z I '1 1/ 7 7 6 I /0 3 i i 7 l6 WITNESSES AS" INVENTOI? &' .15. a wardgah izaze By 7 A TTORNEVS JOSEPH ROBINSON SAYWARD, OF LANCASTER, NEWHAMPSHIRE.

BALANCED VALVE.

Specification of Letters Patent.

Patented Nov. 11, 1919.

Application filed January 28, 1919. Serial No. 273,640.

To all whom it may concern:

Be it known that I, J osnrn R. SAYWARD, a citizen of the United States,and a resident of Lancaster, in the county of Coos and State of NewHampshire, have invented a new and Improved Balanced Valve, of which thefollowing is a full, clear, and exact description.

This invention relates to valves for controlling the flow of fluids, andhas for an object to provide an improved valve of the type known asbalanced valves. The nature of the invention will hereinafter more fullyappear.

In the accompanying drawing, which forms a part of this specification,is shown an illustrative embodiment of the invention particularlydesigned for use in flushing tanks to control the flow of water into thetank and in which the valve is controlled automatically by a floatwithin the tank.

In the drawing, Figure 1 is a vertical, cen tral sectional View of thevalve and of the flushing tank to which the valve is shown as applied;and

Fig. 2 is a sectional view taken on the line 22 of Fig. 1 looking in thedirection of the arrows.

The valve shown for the purposes of illustration comprises a T-shapedvalve casing 1 bored from side to side to provide a slideway 2 in whichslides a cylindrlcal valve sleeve 3. A valve seat 4 faces the end of theslideway, and against it the end of the valve sleeve seats to close alateral valve port 5 adjacent thereto. The valve casing is provided withsuitable connections for the attachment of inlet and outlet pipes.

The flow may be in either direction through the valve. In theconstruction shown, the valve is so connected to the supply pipe thatthe flow of water is through the valve sleeve and out through the portin the direction shown by the arrows, at, b and c. The port 5,accordingly, is hereinafter referred to as the outlet port.

In operation, the valve sleeve 3 is moved to and fro to open and closethe port 5. The operating mechanism shown for the purpose ofillustration consists of a lever 6 pivoted to the valve casing andinterengaging with the valve sleeve to provide an operative connectiontherewith. As shown, the valve sleeve is formed with a recess 7 whichreceives the end of the lever 6. The valve is shown as applied to theflushing tank 8 and is constructed and arranged to be automaticallyoperated by a float 9 within the tank to maintain the water at apredetermined level therein. The float is connected by a rod 10 to thelever to form an operative part of the lever.

The slideway 2 need not be continuous. As shown, it is not continuousbut supports thevalve sleeve only at the ends thereof, the centralportion of the casting being en.- largecl as indicated at 11 to providea freer flow of water through and from the valve. A passage 12 providescommunication between the enlarged portion of the casing and the outletport 5, said passage being formed by a concentric wall inwardly spacedfrom the valve casing 1 to which it is joined at the top, at spacedpoints, to provide a slot for receiving the lever 6 therethrough. Adischarge outlet extends downwardly from the enlargement 11 as shown.

The sliding joint between the valve sleeve and the slideway should befluid tight, espe cially at the end of the valve sleeve remote from thevalve seat. Accordingly, a packing gland is provided, and in theconstruction shown this is arranged at the end of the valve sleeve andcarried thereby, as indicated at 13.

In order that the fluid pressure upon the valve sleeve tending to movethe same in one direction or the other may be as nearly balanced aspossible, I prefer to bevel the seating end outwardly as shown at 14;.This causes the packed end of the sleeve to be balanced by the pressureagainst the bevel, as will be well understood; such bevel also providesa desirable narrow seating edge.

A removable cap 15 forms the valve seat. For convenience of description,the cap is considered as a part of the valve casing. A resilient washer16 is preferably provided to form a resilient seat for the end of thevalve sleeve. The washer shown also extends between the opposing facesof the cap and the end of the casting to seal the joint therebetween.

Having described my invention, what I claim as new and desire to secureby Letters Patent is: I

1. A valve comprising a valve casing having a slideway, a valve seatfacing said slideway at one end thereof, a port between said valve seatand the end of the slideway, and a passaged valve sleeve slidable insaid slideway toward and from said valve seat slideway toward and fromsaid valve seat and formed to seat tightly thereagainst to close andopensaid port, said casing and slideway cooperating to form a passage incontinuation of the port and to form a slot, a and an aotuating leverpivoted on said casing and operatively connected with said valve sleevethrough said slot.

8. A valve comprising a T-shaped valve casingbored from side to sidetoprovide a slideway and having a valve seat facing said slideway at oneend thereof but spaced therefrom to provide a port, said slideway beingspaced from the wall of the casing at oneend to provide a passageconnecting the port with the casing outlet,' a cylindrical sleeve valveslidable in said slideway toward andfroin said valve seat to close andopen said port and a packing gland in the end of said valve sleeveopposite the seating end thereof to provide a fluid-tight joint betweensaid valve sleeve and the slideway.

,4. A valve comprising a valve casing bored to provide a slideway andhaving a removable cap forming a valve seat at one end'of and facingsaid slideway, a washer interposed between said removable cap and thebody of the valve casing, and a sleeve valve slidable in said slidewayand seating against'said washer, said washer forming a packing for thejoint between said removable cap and the body portion of said valvecasing and also providing a yielding seat for the end of said valvesleeve, a passageway between the slideway and the casing at theadjacentend of the valve near its seat.

5. A valve comprising a valve casing bored from one end to provide aninlet and a slideway and presenting a valve seat in a plane transverseto said slideway and facing said slideway at the end farthest from theinlet, with a lateral outlet port adjacent said valve seat, and a valvesleeve slidable in the slideway through which fluid may flow from theinlet, saidvalve sleeve adapted to seat against said valve seat tocontrol the flow of fluid through the outlet port, said Valve casinghaving a discharge outlet intermediate its ends and a passagesurrounding the valve sleeve and between said slideway and casingadjacent to said seat and connecting the outlet port with the dischargeoutlet.

JOSEPH ROBINSON SAYWARD.

, Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents;

Washington, D; G.

